NOTE 1
When using USB power, the screen will always be on, but when using battery power, the screen will turn off after 16s to enter power saving mode.
NOTE 2
Only when using power, you get an feature - voice control, which means you can activate the alarm display by clapping your hands, tapping on the table, or touching the alarm clock.
NOTE 3
If the alarm clock does not light up, please check if the power plug is working properly or Choose a new one; also check if the positive and negative terminals of the 3 AAA batteries are installed correctly.